wifi: iwlwifi: read ECKV table from UEFI

wifi: iwlwifi: read ECKV table from UEFI

Try to read the ECKV table from UEFI first,
and if the WIFI UEFI tables are unlocked or the
table doesn't exist - try to read it from ACPI.

Change iwl_acpi_get_eckv() to receive fwrt as argument so
it will be the same as all iwl_acpi_get_x() functions,
so it could  be generated by the macro.

While at it - move the reading of ECKV to INIT stage. There is no
reason to read it each time we load the FW.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240201155157.d4937cc00727.I36e5fc7f7850229b9b377c80b5203aa47137c97c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>